Laguna fungus

Laguna fungus was a native organism on Laguna 9. If Terran/Lagunans did not regularly inhale droth, they would break out in fungal growth, which would kill them. It was a Terran blockade of Laguna 7, where droth was manufactured, that led to the Terran/Lagunan mass death at the end of the Laguna Wars due to fatal pandemics of fungus. The fungus was apparently not contagious.